Another kind of informal element idea.

In-game name: BRLM

Name: Beryllium

What BRLM does and its reactions: BRLM is an unmovable {only movable via Molten BRLM} solid element. it is a gray element and it shines under fancy display like silicon. If BRLM is met with temperatures that are equal to or over 1287 C, it turns into Molten BRLM. If BRLM touches OXYG it make BMTL [a substitute for beryllium oxide lol] and if it has 100 temperature, its ambient temperaturw will be 133. There is a 1 in 21 chance that VIRS could purify BRLM from SAND, STNE and METL. If BRLM touches CELL [a previous idea of mine] it has a 1 in 73 chance that it will kill CELL. BRLM can be rawly produced if a star in this game turns into a red giant or a star that just has a lot of mass fuses BRLM from LITH [lithium] at 1 hundred million degrees kelvin  and sacrificing 1 ELEC.